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Which of the following is wrong regarding Searle's apparatus method in finding Young's modulus of a given wire?

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Average elongation of wire will be determined with a particular load while increasing the load and decreasing the load.

Reference wire will be just taut and experimental wire will undergo for elongation.

Air bubble in the spirit level will be disturbed from the central position due to relative displacement between the wires due to elongation.

Average elongation of the wires is to be determined by increasing the load attached to both the wires.

answer is D.

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Average elongation of the wires is to be determined by increasing the load attached to both the wires.

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